Parosphromenus allani
Brown 1987

First descrip­tion: Spe­cial announce­ment — two new ana­ban­toid species. Aquar­ist and Pond­keeper, June edition(1987), 34. (Actu­ally, only the anounce­ment of a first descrip­tion, which never fol­lowed. Thus it is valid as a first descrip­tion. Here was also the announce­ment of P. har­veyi, also valid as a first description).

Char­ac­ter­is­tics: total length max. 4.0 cm, strong physique. Dor­sal struc­ture: XI-​XIII, 56, total 1619, anal fin: XII-​XIII, 811, total 2122. ♂ in breed­ing plumage with multi-​colored unpaired fins, includ­ing broader red-​brown and nar­rower blue bands sep­a­rated by a black­ish nar­row band, a con­spic­u­ous dark spot in the cen­ter of the cau­dal fin, blue-​white fin edges with­out the wide iri­des­cent light bands of other species, but still with very col­or­ful effect; pelvic fins blueish with remark­ably short filaments.

The dif­fer­en­ti­a­tion of the ♀ from other species with rounded tail fin is dif­fi­cult, they have usu­ally a some­what more stretched body shape. Colour­ing of the ♀ is sim­i­lar but con­sid­er­ably fainter. Forms from the catch­ment area of Sun­gai Stung­gang are dif­fer­ently coloured (see below), as well as other forms with clearly vis­i­ble round spot on the dor­sal fin (see photo G. Kopic). The sta­tus of these forms is not yet clear.

Sim­i­lar species: low, because the fin colour­ing, which is in prin­ci­ple also seen in the females, can hardly be con­fused with other species.

Occur­rence /​Dis­tri­b­u­tion: North Bor­neo: Sarawak (Malaysia), e.g. sur­round­ings of Sibu (type local­ity), but the species was and is appar­ently quite com­mon in Sarawak. How­ever it is unclear whether the forms found in West Sarawak (river sys­tem Stung­gang; e.g. near Lundu), which look more or less phe­no­typ­i­cally dif­fer­ent, are still belong­ing to this species. Per­haps it is a sec­ond Sarawak-​species or at least a sub-​species (P. sp. Allani cf, also P. spec. Sun­gai Stung­gang or Lundu). It is unclear how other forms are to be judged; see fig­ure. G. Kopic. Brown and Brown 1987 dis­cuss this vari­abil­ity in the Sarawak Museum Jour­nal 37 (p.155170), Kot­te­lat & Ng 2005 cite it as yet unclear (p. 109).

Threat: very high, espe­cially given the rapid destruc­tion of nat­ural wet­land habi­tats and forests in West Sarawak. Remain­ing waters are often affected by human activ­i­ties. Occa­sion­ally P. allani can be found in still waters with pond-​like struc­ture butut it is unclear if the species can sur­vive in it continuously.

Discovery/​First import: Bar­bara and Allan brown 1986. The dis­cov­er­ers have reported about it in detail in Brown and Brown 1987.

Trade: to our knowl­edge this species is only known from few pri­vate imports. It seems as if it has not appeared in com­mer­cial trade to date.

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Care /​Breed­ing: because of its rar­ity, this attrac­tive species is hardly known. G. Kopic, who was among the first breed­ers of this form, rec­om­mends soft to very soft water with pH value of 4.5 to 6. For breed­ing the pH value should be 4.2 to 5. Kopic says P. allani has been very dif­fi­cult to breed up to now.

Behav­iour /​Par­tic­u­lar­i­ties:Head-​down courtship.

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